Discuss the practical use of Dramatica. Have questions about how throughlines should be used, how to create Complex Characters or even the various combinations of the 12 Essential Questions and how they will affect your story go here.

The OS Catalyst moves the story faster toward resolution (or failure to achieve) the OS throughline, but does not change the direction of events like the driver does.

Using a car analogy, the Catalyst is the gas pedal that moves you forward faster (the OS Inhibitor is the brake) and the Driver forces the car to take different routes (a la detours, traffic, accidents, etc.) toward reaching the goal/end.